A Guttate Psoriasis That Tends to Spare Three Tattoos: A Macrophage Liaison

Table 1

Effect of tattoo on psoriasis lesions centered Voronoi patches.

Skin site	CV^1	Mean size (SD)^2		t-test	Figure ^3
		Vout^4	Vin^5	value^6
Tattoo-free	0.46	13416 (6244)	N/A^7	N/A	1
Tattoo #1	0.60	12878 (4791)	28972 (12205)	<0.001	2
Tattoo #2	1.23	15504 (8658)	6680000 (58326)	<0.001	3
Tattoo #3	0.73	12173 (9700)	25902 (14564)	<0.001	3

¹CV, coefficient of variation of the sizes of the Voronoi patches. ²Mean size of Voronoi polygons (SD, standard deviation). ³Figure number in text, where the corresponding skin site is displayed. ⁴V_out, Voronoi patches not crossing tattoo contours. ⁵V_in, Voronoi patches that intersect with tattoo. ⁶P value for the comparison V_out vs. V_in (two-sample t-test). ⁷N/A, not applicable.